Cooling assembly

• US 9,335,105 B2
• Filed: 04/26/2013
• Issued: 05/10/2016
• Est. Priority Date: 05/02/2012
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Research Ltd. (ABB Ltd.)
• Inventors: Siiril, Jouko, Koivuluoma, Timo, Agostini, Bruno, Habert, Mathieu
• Primary Examiner(s): Ciric, Ljiljana
• Application Number:
  US13/871,410
• Publication Number:
  US 20130292088A1
• Time in Patent Office: 1,110 Days
• Field of Search: 165/303, 552/822, 552/83, 553/07
• US Class Current: 1/1
• CPC Class Codes: F28G 1/16 using jets of fluid for removing debris F28G1/12 takes precedence
• CPC Class Codes: F28G 1/166 from external surfaces of heat exchange conduits
• CPC Class Codes: H05K 7/20181 Filters; Louvers
• CPC Class Codes: H05K 7/202 Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers

Abstract

A cooling assembly is disclosed having a device chamber, a cooling chamber, a heat exchanger, a fan and a controller, the heat exchanger having a first heat exchanger unit and a second heat exchanger unit located above the first heat exchanger unit. The fan includes a first fan adapted to generate a first cooling air flow. The cooling assembly further includes a first dust tray located between the first heat exchanger unit and the second heat exchanger unit, the first cooling air flow being directed towards the first dust tray. The first dust tray is adapted to receive and retain at least part of contaminant particles present in the first cooling air flow, the device chamber being separated from the cooling chamber.

Claims

1. A cooling assembly comprising:

a device chamber;

a cooling chamber;

heat exchanger system, wherein the heat exchanger system includes a first heat exchanger unit and a second heat exchanger unit located above the first heat exchanger unit, each of the first and second heat exchanger units including a first end located in the device chamber, and a second end located in the cooling chamber, the heat exchanger system being adapted to transfer heat from the device chamber to the cooling chamber;

fan system, the fan system including a first fan adapted to generate a first cooling air flow from ambient air to the cooling chamber between the first heat exchanger unit and the second heat exchanger unit;

control system, the control means being adapted to control the fan system; and

a first dust tray located between the first heat exchanger unit and the second heat exchanger unit, such that the first cooling air flow will be directed towards the first dust tray, the first dust tray being adapted to receive and retain at least part of contaminant particles present in the first cooling air flow, and wherein the device chamber is separated from the cooling chamber.

2. The cooling assembly according to claim 1, wherein the first dust tray is formed as an air guide adapted to guide the first cooling air flow towards the second heat exchanger unit.

3. The cooling assembly according to claim 2, wherein the first dust tray is adapted to guide the first cooling air flow towards the second heat exchanger unit substantially in a vertical direction.

4. The cooling assembly according to claim 1, wherein the fan system is adapted to direct the first cooling air flow sloping downwards towards the first dust tray.

5. The cooling assembly according to claim 1, wherein the first dust tray is located in a front portion of the cooling chamber, the front portion being removed from the device chamber and adjacent to an exterior wall of the cooling chamber.

6. The cooling assembly according to claim 5, comprising:

a bottom wall of the first dust tray, which is inclined towards the exterior wall of the cooling chamber.

7. The cooling assembly according to claim 6, comprising:

a discharge opening in the exterior wall of the cooling chamber, the discharge opening communicating with the first dust tray and being adapted to allow at least part of contaminant particles retained in the first dust tray to fall out of the cooling chamber.

8. The cooling assembly according to claim 1, comprising:

a first pivotable portion adapted to pivot with relation to the cooling chamber between a use position and a cleaning position, the first dust tray being mounted on the first pivotable portion.

9. The cooling assembly according to claim 8, wherein the first fan is mounted on the first pivotable portion.

10. The cooling assembly according to claim 1, wherein a width of the first dust tray is substantially equal to a width of the cooling chamber.

11. The cooling assembly according to claim 1, wherein the control system are adapted to provide an automatic cleaning operation during which a first cleaning air flow is generated from the cooling chamber to the ambient air, the first cleaning air flow being substantially opposite to the first cooling air flow.

12. The cooling assembly according to claim 11, comprising:

a first cleaning fan located above the second heat exchanger unit and adapted to generate a first cleaning fan air flow directed towards an upper surface of the second end of the second heat exchanger unit, wherein the first cleaning fan air flow forms at least part of the first cleaning air flow.

13. The cooling assembly according to claim 12, wherein the first cleaning air flow is provided at least partially with the first fan by reversing a rotational direction of the first fan.

14. The cooling assembly according to claim 11, wherein the first cleaning air flow is provided at least partially with the first fan by reversing a rotational direction of the first fan.